Your IP address:
Provider:
...

For example: 3.21.97.61

/
Input
Address: 54.237.0.0
Netmask: 255.255.0.0 = 16
Inversion mask: 0.0.255.255
Binary: 00110110.11101101.00000000.00000000
Reserved: No
Result
Network: 54.237.0.0/16 (Class A)
First IP: 54.237.0.1
Last IP: 54.237.255.254
Broadcast: 54.237.255.255
Network range: 54.237.0.0 - 54.237.255.255
List of all IP addresses: 54_237_0_0-16.txt
Number of hosts: 65534
Number of IP addresses: 65536